#!/usr/bin/perl -w
#----------------------------------------------------------------------------
# dia2abg.pl
# Copyright (C) 2002; David Hoover.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#
# The GNU General Public License should be found in the file license.txt.
# For more information about free software, visit http://www.fsf.org/
#----------------------------------------------------------------------------
#############################################################################
# Given a DIA diagram, the script has functions that perform the following
# MTT (model transformation tools) functions:
# 1. Write a _cmp.txt file containing component types:names
# 2. Write a _abg.m file containing an acausal bond graph suitable for input
# to Octave.
# 3. Modify a diagram by changing causality as desired.
#############################################################################
#----------------------------------------------------------------------------
# Dia uses a unique id for each object.
# get_component_data and get_bond_data read the xml file and collect
# important information about component and bond id's, component
# names, and bond connectivity. These data structures are described here:
# The %component_id_tag hash provides component names and types:
#
# key=component_id
# value=component type:name
# 'start' ALWAYS refers to dia's interpretation of start. This means,
# when you draw a line or an arrow, 'start' is the point where you
# initally press down the mouse button. 'end' is the point where you
# release the mouse button. 'start' and 'end' have nothing to do with
# a bond's direction. A half arrow could be on a dia 'start' or 'end'
# point.
# The %bond_id_start_id and %bond_id_end_id hashes provides
# connectivity info for line start points and end points:
#
# key=bond_id
# value=component_id
# The %bond_id_arrow_on_start hash is a boolean that indicates whether
# the power arrow (half head) is on the dia line start point.
#
# key=bond_id
# value=boolean arrow_on_start
# The %bond_id_effort_causality hash is a boolean that provides the
# effort arrow-oriented causality.
#
# key=bond_id
# value=arrow-oriented effort causality.
# The %bond_id_flow_causality hash is a boolean that provides the
# flow arrow-oriented causality.
#
# key=bond_id
# value=arrow-oriented flow causality.
# %mtt_bond_id_index provides a unique positive integer index for each
# Dia bond ID. The index is written to the abg.m file for mtt.
# The %component_label_data hash is a hash of arrays.
# key=column 1 of label file
# value=list(order in label file, col1 of lbl file, col2 of lbl file, ...)
#----------------------------------------------------------------------------
#----------------------------MAIN PROGRAM------------------------------------
use strict;
use Getopt::Long;
use XML::DOM;
my (%component_id_tag, %bond_id_start_id, %bond_id_end_id,
%component_label_data, $objects, %mtt_bond_id_index,
%bond_id_arrow_on_start, %bond_id_flow_causality, %bond_id_effort_causality);
# Parse user options:
my $diagram_name = '';
my $dia_input_file = '';
my $dia_output_file = '';
my $label_file = '';
my $component_list_file = '';
my $debug = 0;
my $create_component_list = 0;
my $create_abg = 0;
my $abg_file = '';
my $change_flow_causality = '';
my $change_effort_causality = '';
GetOptions ('diagram_name=s' => \$diagram_name,
'dia_input_file=s' => \$dia_input_file,
'dia_output_file=s' => \$dia_output_file,
'label_file=s' => \$label_file,
'component_list_file=s' => \$component_list_file,
'debug' => \$debug,
'create_component_list' => \$create_component_list,
'create_abg' => \$create_abg,
'abg_file=s' => \$abg_file,
'change_flow_causality=s' => \$change_flow_causality,
'change_effort_causality=s' => \$change_effort_causality,
);
die usage() if $diagram_name eq '';
# Use defaults if necessary:
$dia_input_file = $diagram_name . "_abg.dia" if ($dia_input_file eq '');
$dia_output_file = $diagram_name . "_cbg.dia" if ($dia_output_file eq '');
$label_file = $diagram_name . "_lbl.txt" if ($label_file eq '');
$abg_file = $diagram_name . "_abg.m" if ($abg_file eq '');
$component_list_file = $diagram_name . "_cmp.txt" if ($component_list_file eq '');
# Start Parsing XML, and creating files:
my $dom = new XML::DOM::Parser;
my ($doc);
$doc = $dom->parsefile($dia_input_file);
$objects = get_objects_node($doc,"Bond Graph");
get_component_data($objects);
get_bond_data($objects);
create_component_list() if ($create_component_list);
if ($create_abg) {
open (OUT,">$abg_file") ||
die "Cannot open $abg_file for writing.\n";
# Don't update the label file unless we are creating component list and abg simultaneously...
if ($create_component_list) {
print STDERR "WARNING: Label file may be stale.\n"
#system("abg2lbl_fig2txt -c $component_list_file $diagram_name") &&
#system("abg2lbl_fig2txt -x $diagram_name") && die "abg2lbl_fig2txt failed.";
}
get_label_data();
output_abg();
output_bond_causality();
parse_aliases();
print OUT "endfunction\n";
}
if ($change_flow_causality ne '' || $change_effort_causality ne '') {
open (DIA_OUT,">$dia_output_file") ||
die "Cannot open $dia_output_file for writing.\n";
print DIA_OUT $doc->toString;
close DIA_OUT;
}
exit 0;
#----------------------------SUBROUTINES-------------------------------------
sub create_component_list {
my ($name,@line,$i);
print_debug("CREATING unique_raw_list...\n");
open (RAW,">$component_list_file") ||
die "Cannot open $component_list_file for writing.\n";
foreach (values(%component_id_tag)) {
id_cleaner();
print RAW $_ . "\n" if (/:/);
}
close(RAW);
}
sub get_label_data {
my ($name,@line,$i);
print_debug("READING DATA FROM $label_file...\n");
open (LBL,$label_file) || die "Cannot open label file: $label_file\n";
$i=0;
while (<LBL>) {
chomp;
# Get rid of commented lines:
next if (/^(\s)*[%\#]/);
# Get rid of empty or whitespace-only lines:
next if (/^(\s)*$/);
# Get rid of leading/trailing whitespace:
s/^\s*(\S.+\S)\s*$/$1/;
print_debug("label: $_ \n");
@line = split(/\s+/);
die "Label file entries must have at least 3 columns!\n" unless
@line >= 3;
$name = shift(@line);
$component_label_data{$name} = [ ($i++,@line) ];
}
close(LBL);
}
sub parse_aliases {
my ($name,@line,$alias);
print OUT "# Aliases\n";
print OUT "# A double underscore __ represents a comma\n";
open (LBL,$label_file) || die "Cannot open label file: $label_file\n";
while (<LBL>) {
chomp;
# Get rid of everything except ALIAS lines:
next unless (s/^[%\#]ALIAS(.*)$/$1/);
# Get rid of leading/trailing whitespace:
s/^\s*(\S.+\S)\s*$/$1/;
@line = split(/\s+/);
die "Label file ALIAS entries must have 2 columns!\n" unless
@line == 2;
print OUT "$diagram_name.alias.$line[1] = \"$line[0]\";\n";
}
close(LBL);
print OUT "## Port domain and units\n";
print OUT "## Explicit variable declarations\n";
}
sub get_objects_node {
my ( $doc_node, $layer_name )= @_;
my ($root,$layer_node,$objects);
$root = get_first_element_subnode($doc_node);
die "could not find top-level element dia_diagram.\n"
unless $root->getTagName eq 'dia:diagram';
$layer_node = get_first_subnode_by_nodename_attribute(0,$root,"dia:layer","name",$layer_name);
die "I found no dia:layer named $layer_name. Are you sure the diagram has one?\n" unless
$layer_node->getTagName eq 'dia:layer' &&
$layer_node->getAttributeNode("name")->getValue eq $layer_name;
$objects = $layer_node->getElementsByTagName('dia:object');
return $objects;
}
sub output_abg_header {
my ($date);
$date = `date`; chomp($date);
print OUT <<"EOF";
function [${diagram_name}] = ${diagram_name}_abg
# This function is the acausal bond graph representation of $diagram_name
# Generated by dia2abg.pl on $date
# The file is in Octave format
# Subsystems and Ports
EOF
}
sub output_component {
my ($NM,$type,$cr,$arg,$rep,$stat,$connections,$subsys_or_port) = @_;
$_=$NM; remove_brackets(); $NM = $_;
my $pretty_name = ($subsys_or_port eq "ports") ? "Port" : "Component";
print OUT <<"EOF";
# $pretty_name $NM
${diagram_name}.${subsys_or_port}.${NM}.type = "$type";
${diagram_name}.${subsys_or_port}.${NM}.cr = "$cr";
${diagram_name}.${subsys_or_port}.${NM}.arg = "$arg";
${diagram_name}.${subsys_or_port}.${NM}.repetitions = $rep;
${diagram_name}.${subsys_or_port}.${NM}.status = $stat;
${diagram_name}.${subsys_or_port}.${NM}.connections = [$connections];
EOF
}
# This sort function allows components to be sorted in same order as
# label file, and alphabetically for components not in label file.
sub by_label_file {
my ($a_index,$b_index);
$a_index = $component_label_data{id_to_name($a)}[0];
$b_index = $component_label_data{id_to_name($b)}[0];
$a_index = 1e9 unless defined($a_index);
$b_index = 1e9 unless defined($b_index);
return ($a_index <=> $b_index) || ($a_index cmp $b_index);
}
sub output_abg {
my ($cr,$rep,$stat,$NM,$type,$arg,$bond_id,$start,$end,@clist,$connections,
$strlength,$subsys_or_port);
print_debug("WRITING OUTPUT TO STDIO...\n");
$rep = "1";
$stat = "-1";
output_abg_header();
foreach my $id (keys(%component_id_tag)) {
($subsys_or_port,$_) = id_to_name($id);
remove_brackets(); $NM = $_;
$type = id_to_type($id);
$cr = "" unless defined($cr = $component_label_data{$NM}[1]);
$arg = "" unless defined($arg = $component_label_data{$NM}[2]);
@clist = ();
while (($bond_id,$start) = each(%bond_id_start_id)) {
push(@clist, ($bond_id_arrow_on_start{$bond_id} ? -1 : 1) *
$mtt_bond_id_index{$bond_id}) if $start eq $id;
}
while (($bond_id,$end) = each(%bond_id_end_id)) {
push(@clist, ($bond_id_arrow_on_start{$bond_id} ? 1 : -1) *
$mtt_bond_id_index{$bond_id}) if $end eq $id;
}
$connections = join(" ",@clist);
output_component($NM,$type,$cr,$arg,$rep,$stat,$connections,$subsys_or_port);
}
# order component id's so that entries found in _lbl.txt file are
# in _lbl file order, and other entries follow.
my (@id_list);
@id_list = keys(%component_id_tag);
@id_list = sort by_label_file @id_list;
# calculate string length of longest component name (for octave):
$strlength=0;
foreach my $compname (@id_list) {
my $name = id_to_name($compname);
$strlength = length($name) if length($name) > $strlength;
};
print OUT "# Ordered list of Port names\n";
my $i=1;
foreach my $id (@id_list) {
my ($subsys_or_port,$name) = id_to_name($id);
if ($subsys_or_port eq "ports") {
$_ = $name; remove_brackets(); $name = $_;
print OUT " " . $diagram_name . ".portlist($i,:)" . ' = "'
. $name . " " x ($strlength - length($name)) . '";' . "\n";
$i++;
}
}
print OUT "\n";
print OUT "# Ordered list of subsystem names\n";
$i=1;
foreach my $id (@id_list) {
my ($subsys_or_port,$name) = id_to_name($id);
if ($subsys_or_port eq "subsystems") {
print OUT " " . $diagram_name . ".subsystemlist($i,:)" . ' = "'
. $name . " " x ($strlength - length($name)) . '";' . "\n";
$i++;
}
}
print OUT "\n";
}
sub output_bond_causality {
my ($mtt_bond_id,$dia_bond_id,$mtt_flow_causality,$mtt_effort_causality,
%reverse_mtt_bond_id_index);
print OUT "# Bonds\n";
print OUT " $diagram_name.bonds = [\n";
%reverse_mtt_bond_id_index = reverse(%mtt_bond_id_index);
while (($mtt_bond_id,$dia_bond_id) = each(%reverse_mtt_bond_id_index)) {
$mtt_flow_causality = $bond_id_flow_causality{$dia_bond_id};
$mtt_effort_causality = $bond_id_effort_causality{$dia_bond_id};
print OUT " $mtt_effort_causality $mtt_flow_causality\n";
}
print OUT " ];\n\n";
}
sub get_component_data {
my ( $objects_node )= @_;
my($obj,$id,$attr,$comp,$strattr,$str_elem,$string);
print_debug("READING COMPONENTS FROM $dia_input_file...\n");
for my $i (0..$objects_node->getLength-1) {
$obj = $objects_node->item($i);
next if ($obj->getAttributeNode("type")->getValue ne "BondGraph - MTT port");
$id = $obj->getAttributeNode("id")->getValue;
print_debug($id . "\n");
$attr = get_first_subnode_by_nodename_attribute(0,$obj,"dia:attribute","name","text");
$comp = get_first_subnode_by_nodename_attribute(0,$attr,"dia:composite","type","text");
$strattr = get_first_subnode_by_nodename_attribute(0,$comp,"dia:attribute","name","string");
$str_elem = get_first_element_subnode($strattr);
$string = get_first_text_subnode($str_elem);
$component_id_tag{$id} = $string->getData;
}
die "There are no components!\n" unless keys(%component_id_tag) > 0;
}
# Dia stores its attributes in a strange way, not using typical xml attributes.
sub get_dia_attribute_value {
my ($type, $attribute_node )= @_;
my ($subnode);
$subnode = get_first_subnode_by_nodename_attribute(0,$attribute_node,$type);
return $subnode->getAttributeNode("val")->getValue;
}
# Dia stores its attributes in a strange way, not using typical xml attributes.
sub set_dia_attribute_value {
my ($type, $attribute_node, $new_value )= @_;
my ($subnode);
$subnode = get_first_subnode_by_nodename_attribute(0,$attribute_node,$type);
$subnode->setAttribute(val => $new_value);
# return $subnode->getAttributeNode("val")->getValue;
}
sub get_arrow_info {
my ( $object_node, $id, $id_index )= @_;
my($attribute,$attributes);
$attribute = get_first_subnode_by_nodename_attribute(1,$object_node, "dia:attribute", "name", "arrow_on_start");
$bond_id_arrow_on_start{$id} = defined($attribute) ? get_dia_attribute_value("dia:boolean",$attribute) : 0;
$attribute = get_first_subnode_by_nodename_attribute(1,$object_node, "dia:attribute", "name", "effort_causality");
change_causality($id_index, $attribute, $change_effort_causality);
$bond_id_effort_causality{$id} = defined($attribute) ? get_dia_attribute_value("dia:enum",$attribute)-1 : 1;
$attribute = get_first_subnode_by_nodename_attribute(1,$object_node, "dia:attribute", "name", "flow_causality");
change_causality($id_index, $attribute, $change_flow_causality);
$bond_id_flow_causality{$id} = defined($attribute) ? get_dia_attribute_value("dia:enum",$attribute)-1 : 1;
}
sub change_causality() {
my ($id_index, $attribute_node, $causality_change_string)=@_;
my ($mtt_id, $arrow_oriented_causality);
foreach my $id_causality (split(/;/,$causality_change_string)) {
($mtt_id, $arrow_oriented_causality) = split(/:/,$id_causality);
if ($mtt_id eq "all" || $id_index == $mtt_id) {
set_dia_attribute_value("dia:enum",$attribute_node,$arrow_oriented_causality + 1);
}
}
}
sub get_bond_data {
my ( $objects_node )= @_;
my ($id_index, $obj, $id, $connections, $connection, $to, $handle,
$connections_att);
print_debug("READING BONDS FROM $dia_input_file...\n");
$id_index = 0;
for my $i (0..$objects_node->getLength-1) {
$obj = $objects_node->item($i);
next if ($obj->getAttributeNode("type")->getValue ne "BondGraph - MTT bond");
$id = $obj->getAttributeNode("id")->getValue;
print_debug("Bond " . $id . ":\n");
$mtt_bond_id_index{$id} = ++$id_index;
get_arrow_info($obj,$id,$id_index);
print_debug("Flow causality ($id):" . $bond_id_flow_causality{$id} . "\n");
print_debug("Effort causality ($id):" . $bond_id_effort_causality{$id} . "\n");
print_debug("Arrow on start ($id):" . $bond_id_arrow_on_start{$id} . "\n");
# get connection info
$connections_att = $obj->getElementsByTagName('dia:connections');
die "A bond without connections exists!\n"
unless $connections_att->getLength > 0;
$connections = $connections_att->item(0)->getElementsByTagName('dia:connection');
die "Bond $id does not have two connections!\n" unless
$connections->getLength == 2;
for my $j (0..$connections->getLength-1) {
$connection = $connections->item($j);
$handle = $connection->getAttributeNode("handle")->getValue;
$to = $connection->getAttributeNode("to")->getValue;
print_debug("handle " . $handle . "\n");
print_debug("to " . $to . "\n");
if ($handle eq "0") {
$bond_id_start_id{$id} = $to;
} else {
$bond_id_end_id{$id} = $to;
}
}
}
die "There are no bonds!\n" unless keys(%mtt_bond_id_index) > 0;
}
# if($relax), then this routine will return 'undef' instead of dying, if valid node not found.
sub get_first_subnode_by_nodename_attribute {
my ( $relax, $node, $nodename, $key, $value)= @_;
my ($subnodes,$subnode);
$subnodes = $node->getChildNodes;
for my $k (0..$subnodes->getLength-1) {
next if ($subnodes->item($k)->getNodeType != ELEMENT_NODE);
next if ($subnodes->item($k)->getNodeName ne $nodename);
$subnode = $subnodes->item($k);
next if defined($value) && defined($key) &&
($subnode->getAttributeNode($key)->getValue ne $value);
return $subnode;
}
if($relax) {
return undef;
} else {
die "I found no subnode of " . $node->getNodeName .
" named $nodename with key/value pair: ($key,$value).\n" unless
$subnode->getTagName eq $nodename &&
$subnode->getAttributeNode($key)->getValue eq $value;
}
}
sub get_first_element_subnode {
my ( $node )= @_;
my ($subnodes,$subnode);
$subnodes = $node->getChildNodes;
for my $k (0..$subnodes->getLength-1) {
next if ($subnodes->item($k)->getNodeType != ELEMENT_NODE);
$subnode = $subnodes->item($k);
return $subnode;
}
die " I found no element subnode of " . $node->getNodeName . "." unless
$subnode->getNodeType == ELEMENT_NODE;
}
sub get_first_text_subnode {
my ( $node )= @_;
my ($subnodes,$subnode);
$subnodes = $node->getChildNodes;
for my $k (0..$subnodes->getLength-1) {
next if ($subnodes->item($k)->getNodeType != TEXT_NODE);
$subnode = $subnodes->item($k);
return $subnode;
}
die " I found no text subnode of " . $node->getNodeName . "." unless
$subnode->getNodeType == TEXT_NODE;
}
sub id_cleaner {
s/#?([^#]*)#?/$1/;
}
sub remove_brackets {
s/^\[([^\]]*)\]$/$1/;
}
sub id_to_type {
my ( $id )= @_;
my($type,$name);
$_ = $component_id_tag{$id};
id_cleaner();
($type, $name) = split(/:/);
return $type;
}
# If 1 LHS argument is used, it returns component name. If 2 are used, it return
# "subsystem" or "port" depending on whether brackets are found in the name.
sub id_to_name {
my ( $id )= @_;
my($type,$name);
$_ = $component_id_tag{$id};
id_cleaner();
($type, $name) = split(/:/);
if(!defined($name)) { $name = $id };
return ( ($name =~ /^\[[^\]]*\]$/ ? "ports" : "subsystems" ),$name);
}
sub print_debug {
print STDERR $_[0] if ($debug);
}
sub usage {
return
"\n" .
"Usage: dia2abg.pl --diagram_name <diagram_name> [options]\n" .
"Options:\n" .
"\t--dia_input_file <dia_input_file>\n" .
"\t--label_file <label_file>\n" .
"\t--component_list_file\n" .
"\t--create_component_list\n" .
"\t--create_abg\n" .
"\t--debug\n" .
"\t--abg_file <abg_file>\n" .
"\t--change_flow_causality <bond causality spec>\n" .
"\t--change_effort_causality <bond causality spec>\n" .
"\n" .
"\t\tBond causality spec:\n" .
"\t\t 'bond:causality;bond:causality;...'\n" .
"\t\tbond:\n" .
"\t\t [mtt_bond_id|all]\n" .
"\t\tcausality:\n" .
"\t\t [-1|0|1]\n" .
"\n" .
"\t\tCausality is arrow-oriented-causality.\n" .
"\t\tAny causality changes are made BEFORE further processing.\n" .
"\n"
}